Hydrogen production and coke resistance characteristic during volatile reforming over Fe2O3–Ce2O3/sludge char catalyst

Wang, Bo; Liu, Yinhe; Guan, Yu; Zhang, Guohong; Xing, Dingyi

doi:10.1016/j.jclepro.2023.139836

Cited by 1 publication

(1 citation statement)

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“…The peak of Ni in the catalyst after the reaction shifted to the direction of high binding energy, indicating that Ni was closer to the metallic state in the catalyst after the reaction but still carried a negative charge [25]. The disappearance of lattice oxygen peaks on the surface of the material after the reaction was attributed to the consumption of adsorbed oxygen and the transformation of lattice oxygen by the surface oxygen evolution reaction [21,50,51]. This was consistent with previous speculation about the occurrence of oxygen evolution reaction in perovskites [52].…”

Section: Catalyst Stability Evaluationmentioning

confidence: 99%

Deciphering the Pivotal Reaction Conditions for Hydrogen Production from Tar Catalytic Cracking by Perovskite

Chen,

Xi,

et al. 2024

Catalysts

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The catalytic cracking of pyrolysis gasification tar into H2 has garnered significant attention due to its exceptional conversion efficiency. In this study, the effects of pollutant concentration, residence time, weight hourly space velocity (WHSV), and reaction temperature on the hydrogen performance of LaFe0.5Ni0.5O3 perovskite were comprehensively investigated. Results revealed that moderate pollutant concentration (0.3 g/L), low-medium residence time (250 SCCM), and low WHSV (0.24 gtoluene/(gcat·h)) facilitated efficient interaction between LaFe0.5Ni0.5O3 and toluene, thus achieving high hydrogen production. An increase in reaction temperature had minimal effect on the hourly hydrogen production above 700 °C but caused a significant increase in methane production. Additionally, the effects of oxygen evolution reactions, methane reactions, and methane catalytic cracking reactions of perovskite induced by different reaction conditions on tar cracking products were discussed in detail. Compared to previous reports, the biggest advantages of this system were that the hydrogen production per gram of tar was as high as 1.002 L/g, and the highest hydrogen content in gas-phase products reached 93.5%, which can maintain for approximately 6 h. Finally, LaFe0.5Ni0.5O3 showed good thermal stability, long-term stability, and catalyst reactivation potential.

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